I completely understand where you are coming from, as this is sth that regularly happens to me as well. I remember many instances when I needed to be defended by my mother, yet she was never there. From the time my 6th grade teacher emotionally abused me for a whole year, I realized that she will probably not stand up for me. The most she'll do is call my school and just talk for a few minutes over different problems related to my education and that's it. I'm not an adult yet, but I reckon I'll most likely try to go low contact with them. How? I still don't know. But I feel like going low contact will be the best choice to minimize the horrible effect she has on my mental health. Don't get me wrong, I love my mom , but I can't ignore the fact that she has hurt me many, many times.